1 files changed, 22 insertions, 2 deletions
diff --git a/spec/ruby/core/numeric/imaginary_spec.rb b/spec/ruby/core/numeric/imaginary_spec.rb
index ec708cb505..7b5d94cc75 100644
--- a/spec/ruby/core/numeric/imaginary_spec.rb
+++ b/spec/ruby/core/numeric/imaginary_spec.rb
@@ -1,6 +1,26 @@
 require_relative '../../spec_helper'
-require_relative 'shared/imag'
 
 describe "Numeric#imaginary" do
-  it_behaves_like :numeric_imag, :imaginary
+  before :each do
+    @numbers = [
+      20,             # Integer
+      398.72,         # Float
+      Rational(3, 4), # Rational
+      bignum_value, # Bignum
+      infinity_value,
+      nan_value
+    ].map{|n| [n,-n]}.flatten
+  end
+
+  it "returns 0" do
+    @numbers.each do |number|
+      number.imaginary.should == 0
+    end
+  end
+
+  it "raises an ArgumentError if given any arguments" do
+    @numbers.each do |number|
+      -> { number.imaginary(number) }.should.raise(ArgumentError)
+    end
+  end
 end